Briefly, in accordance with one or more embodiments, if two or more deices belong to a multicast group, a media access control (MAC) message may be transmitted to the multicast group as a multicast message to provide parameters and/or instructions to the devices. If the devices are in an idle mode, the MAC message may be transmitted during a paging listening interval. A group message may be transmitted as a multicast message to one or more devices in one or more groups in order to assign, reassign, or update the group identifier or multiple devices. If an acknowledgment message was not received by one or more the devices, the group message may be transmitted as a unicast message to the one or devices from which no acknowledgment message was received.